Burglar-alarm.



PATENTED MAY 26,1903.,

No. 729,252. B. IARTHURS.

BURGLAR ALARM.

APPLIUATION FILED KAY Z, 1902.

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@ya V UNITED STATE-svl `lEatented May 26, .1903.

'PATENT OFFICE.

BIDDLE ARTHURS, OF PITTSBURG, PENNSYLVANIA.

BuRoLAR-ALARM.

- SPECIFICATION forming part 0f Letters Patent No. 729,252, dated. May 26, 1903.

Application iiled May 2,1902. Serial No. 105,645. (No model.)

To all whom it may concern.- Y

Be it known that I, BIDDLE ARTHURS, a citizen of the Uni ted States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in BurglarjAlarms,oiwhichl the following is a specification, reference being had therein to the accompanying drawings.

Figure 1 is a View in front elevation of a portion of the upper' and lower sashesof a windowequipped with my improved alarm. Fig. 2 is a vertical sectional view on the line II II of Fig. 1. Fig. 3 is a horizontal sectional view indicated by the line III III of Fig. l, showing the device in plan view. Fig. 4 is a view showing the device applied to a door. Fig. 5 is a horizontal sectional view indicated by the line V V of Fig. 4. Fig. 6 is a detail View showing a locking device for the buttons.

My invention relates to improvements in burglar-alarms; and it consists of a mechanical alarm, as a bell, with means for operat` ing it by the opening of either sash or a door, with means for adjustment to operative or inoperative positions.

The object of the invention is to provide an economical alarm device which can be attached toeither window or door and can be readily thrown into or out of operative position, dispensing with wires, batteries, or other complicated mechanism.

Referring to the drawings, the alarm device consists-of a bell 2, of well-known construction, containing a spring adapted to be Wound up and continuously operated, a knocker sounding the bell as long as a button 3 is depressed, permitting the stored energy of the spring to sound the bell until it is run down. Inasmuch as the bell per se does not form any part of the present invention, it is not therein more specifically described or illustrated, and it will be understood that any other suitable device may be substituted which is adapted to be actuated to sound an alarm by depressing a button or other suitable abutment. While one of the purposes of the invention is to dispense with circuit-wires or batteries,

nevertheless an electric button might be so arranged, if desired, as to be depressed and operated by the mechanism and to be moved into and out of the operative path of such lnechanisln in the manner hereinafter de- `face '7, which by movement of the sash will come into contact with and depress the abutment 3 causing the alarm to sound. The eX- tended upper portion of the member 6 may be of an increased thickness, so that at any position of the sash other than the closed p0- sition the button 3 will be kept depressed, continuing the operation of the alarm. By this construction the alarm will be sounded either by lowering the upper sash or by raising the lower one, either operation serving to change the relative position of the operative parts, and it will thus be seen that the same single elements of the'alarm and its operatingcam will serve for both sashes of the window and will indicate a movement of either sash.

The carrier 4 being mounted in the keepers 5 permits of the movement of the alarm device 2 to the operative position (shown in Figs. 1 and 3) or to the inoperative position, (indicated by botted lines in Fig. 1,) to which position it maybe shifted-as, for instance, during the daywhen the sashes may be raised or lowered without actuating the alarm. For the purpose of securing the alarm in either position a holding device, as a set-screw 8, is mounted in one of the keepers or elsewhere, adapted to bind against the sliding portion of the carrier 4, holding it in either position. In the construction shown in Figs. 4 and 5 the alarm device is adjustably mounted in the same manner as has been described in proximity to the edge of the door 9, the cam 6 being mounted upon the door at any suitable height or location and adapted to bear against the contact and depress the button 3 when the door is opened and to operate the alarm in the same manner as has been described. When used as a door-alarm, wher- IOO ever it is desired that the alarm shall continually operate after having once been actuated by the cam even though the cam-pressure should immediately be released, as by again closing the door or window, or if the door should be opened clear o the button, I have provided a locking device consisting of a spring-catch 10, adapted to spring into a retaining-notch 11 in the stem of the button 3, which will hold the stem inwardly, ,causing the alarm to continually operate until the spring-catch is released, thereby producing a continued sounding of the alarm. This last feature is of advantage, as it will thereby call attention to any attempt to open the window or door even though such attempt be immediately discontinued.

The advantages of my invention will be readily appreciated, as it provides a simple, eicient, and economical device for the purpose which is not liable to get out of order or lose its efficiency by lapse of time, failure of batteries, or other reasons incident to the general class of` burglar-alarms.

Having described my invention, what I claim is- 1. In an alarm device: the combination of a bell having an outwardly extending depressible operating-button adapted to release ringing mechanism, and a tapered depressingcam so mounted with relation to said button, that upon movement either of the alarm or cam in a certain direction, the cam will make and maintain sliding contact with and depress the button, substantially as set forth.

2. In an alarm device, the combination of a bell, an actuating-button adapted to sound said bell, and a tapered depressing-cam having a continuous extended surface adapted to come into contact with the button and to maintain the button in a depressed position to continue the sounding of the bell, substantially as set forth.

3. The combination with one of the sashes of a window, of a bell adapted to operate continuously, and provided with an operatingbutton, and a tapered depressing-cam having a continuous extended face mounted on the other sash and adapted to depress the button and continuously operate the alarm upon movement of either sash, substantially as set forth. v

4. The combination with one of the sashes of a window, of a bell adapted to operate continuously, and provided with an operatingbutton, a supporting-bracket for the device, adjustably secured to the sash, and a tapered depressing-cam having a continuous extended face mounted on the other sash and adapted to depress the button and continuously operate the alarm upon movement of either sash, substantially as set forth.

5. The combination of a bell provided with a pressing-button, a carrier therefor adapted to be adjusted laterally into and out of the path of travel of the cam, and an actuatingcam adapted to depress the butt0n,with means for locking the button to produce continuous operation of the alarm.

In testimony whereof I aiiix my signature in presence of two witnesses.

BIDDLE ARTHURS.

Witnesses:

JAS. J. MCAFEE, C. M. CLARKE. 

